US3576179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Economizer for shell-and-tube steam generator
Assignee: Combustion Engineering Inc
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Filing: 1969-12-24
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Granted: 1971-04-27
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Expires: 1989-12-24
Abstract
Abstract A preheater or economizer section is provided in a shell-andtube vapor generator. The preheater section is baffled to conduct incoming feedwater along a flow path within which it will be heated to an elevated temperature before contacting parts of the vapor generator unit that would be susceptible to thermal stresses.
Inventors
- 👤 Nicholas D Romanos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:57
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/023; F22B1/026
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
169 words
A shell-and-tube heat exchanger for the generation of vapor by the indirect transfer of heat from a heating fluid to a vaporizable liquid comprising: a. a generally cylindrical pressure shell defining a vapor-generating chamber including an evaporator section, b. a bundle of heat exchange tubes extending through said vapor-generating chamber, c. means for circulating heating fluid through said tubes, d. nozzle means penetrating said shell for supplying low temperature vaporizable liquid to said vapor-generating chamber, e. means within said vapor-generating chamber for preheating the vaporizable liquid supplies thereto including compartment means disposed upstream of said evaporator section comprising: i. baffle means defining a pair of concentric annular flow passages and an interior chamber, ii. means for conducting liquid from said nozzle means in spaced relation from the wall of said pressure shell to the innermost of said annular flow passage and thence in series through said interior chamber and the outermost of said annular flow passages, and iii. means connecting said outermost annular flow passage with said evaporator chamber.
Claim 2
Dependent Claim
169 words
A shell-and-tube heat exchanger for the generation of vapor by the indirect transfer of heat from a heating fluid to a vaporizable liquid comprising: a. a generally cylindrical pressure shell defining a vapor-generating chamber including an evaporator section, b. a bundle of heat exchange tubes extending through said vapor-generating chamber, c. means for circulating heating fluid through said tubes, d. nozzle means penetrating said shell for supplying low temperature vaporizable liquid to said vapor-generating chamber, e. means within said vapor-generating chamber for preheating the vaporizable liquid supplies thereto including compartment means disposed upstream of said evaporator section comprising: i. baffle means defining a pair of concentric annular flow passages and an interior chamber, ii. means for conducting liquid from said nozzle means in spaced relation from the wall of said pressure shell to the innermost of said annular flow passage and thence in series through said interior chamber and the outermost of said annular flow passages, and iii. means connecting said outermost annular flow passage with said evaporator chamber.
Claim 3
Dependent Claim
91 words
A shell and tube heat exchanger as recited in claim 1 wherein said compartment means comprises: a. a pair of concentrically disposed, axially coextensive cylindrical baffles cooperating together and with the inner surface of said pressure shell to form said concentric annular flow passages, b. a laterally extensive baffle plate means closing the upper end of said inner flow passage and said interior chamber, and c. means forming an opening in the innermost of said cylindrical baffle plates to establish fluid communication between said inner flow passage and said interior chamber.
Claim 4
Dependent Claim
27 words
A shell-and-tube heat exchanger as recited in claim 2 wherein the opening in the innermost of said cylindrical baffle plates is disposed at the upper end thereof.
Claim 5
Dependent Claim
35 words
A shell-and-tube heat exchanger as recited in claim 3 including a plurality of transversely extending baffle plates within said interior chamber for direction the flow of vaporizable liquid therethrough in crossflow relation to the tubes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |